In fact, it could hid problem that where not expected.

I will push a test for this latter today ..

If there is an error in the inner graph, without this change in the CVM you
do not get a message saying what was wrong.

graph

This fix a failing test.

numpy.frompyfunc function now always return an dtype object.

Otherwise an error is shown to the user.

It's a little faster than the numpy implementation, but not much.

Extended known failure case to numpy 1.6.x instead of only 1.6.0, until we know better about the intended numpy behavior